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CSS Message Time Stamping

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Summary
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Latest update and next planned activity

Date of latest update
Latest Update
11/08/2023 - This Change Proposal has been withdrawn. During the progression of the Preliminary Impact Assessment work, it was found that an existing data item ‘EventDate’ could be leveraged to address the issue stated in the Change Proposal. R107 will be open for adoption until 25/08/2023.

Impacts Overview

Impacted Consumers
Electricity Gas Domestic Non-Domestic
Impacted REC Parties and Market Participants
Energy Supplier Distribution Network Operator Gas Transporter DCC Shipper Data Collector Data Aggregator Meter Asset Provider
Impacted REC Documents
Schedule 25 - Central Switching Service Schedule 27 - RMP Lifecycle Schedule 26 - Switching Service Management
Impacted REC Services
Central Switching Service (CSS)
Priority and rationale

Priority last updated on 29 May 2026

Solution development

No documents available.

Change Plan

Test

In Progress

Start:

14 Apr 2023

Due:

19 Mar 2026

Completion:

19 Mar 2026

Original submission

Change details

Leo Brown - DCC
14 Apr 2023

Change details

CSS Message Time Stamping
Currently there is no mechanism that allows CSS end users to correctly interpret the order that messages came into effect within CSS. This can result in complications when where end user systems become out of sync with CSS.
CSS end users are unable to correctly determine the order of events, or messages ensure it accurately reflects CSS as the data master.
Each message to be time stamped with the CSS effective date.
Synchronisation issue has been discussed at industry forums and potential solution options workshopped with the Switching Operator and the Technical Design Authority (TDA). This Change Proposal will compliment outcomes to Change Proposals R0080 ‘Failed to Deliver’ and R0096 ‘CSS Regeneration Functionality’.

Related items

R0080 ‘Failed to Deliver’ and R0096 ‘CSS Regeneration Functionality’.
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No details provided

Impacts

Electricity, Gas, Domestic Prepayment, Domestic Credit, Microbusiness, Small and Medium Enterprise (SME), Industrial and Commercial (I&C), Other (please specify in the Additional information box below)
Switching experience
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Schedule 25 - Central Switching Service, Schedule 27 - RMP Lifecycle, Schedule 26 - Switching Service Management
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No details provided
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No details provided
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Market Message Catalogue
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No details provided
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Central Switching Service (CSS), Switching Operator
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Energy Suppliers, Distribution Network Operators, Gas Transporters, DCC, Shippers, Data Collectors, Data Aggregators, Meter Asset Providers, EES Users, GES Users
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No details provided
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No
No details provided

Priority & timing

Yes
Synchronisation issues form a significant proportion of raised incidents in CSS. If unresolved and switching volumes increase this could result in significant complications for the Switching Operator and impact consumer experience with Switching.
As soon as practicable.
There are synergies with R0080 ‘Failed to Deliver’ and R0096 ‘CSS Regeneration Functionality’, however this Change Proposal should be able to progress independently.
No details provided
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Activity

caroline.milner has been allocated as SME.
Raise alternative Change Proposal
Change Process user guide